该齿轮座外套设外套管，该齿轮座在座体上旋转带动该外套管和碟形天线旋转。
An outer sleeve is sheathed at the outside of the gear seat which rotates on the base to drive the outer sleeve and a dish-shaped antenna to rotate.
就1200齿轮座应用到790开坯机上所进行的改造情况作了方案论证，结构设计和参考数计算。
This paper researches argumentation, structural design and reference coefficient calculation of 1200pinion housing rebuilding when it's applied to 790 first rolling mill.
发动机配件类：齿轮室、气门室罩盖、 链轮室罩盖、预热器座、水泵泵盖、进气歧管、泵箱；
Engine fittings series:Gear chamber, Cavaera cover, Sprocket rooms cover, Preheaterbase, Water pump Cover, Intake manifold, Pump box.
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